Enhancements
* Added an option to show or hide the default aisle in a shop.
* Improved visibility settings: unmapped products are now hidden when the default aisle is hidden.
* Introduced expand/collapse functionality for aisles.
* Added an option to show or hide empty aisles, with empty aisles hidden by default.
* Enabled editing a shop directly from the shopping list.
* Added an option to sort a list by name.
* Added explanatory text to blank lists to clarify why no items are shown.

Bug Fixes
* Improved the reliability of long-press actions on shopping list items.
